package com.atguigu.gulimall.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.to.mq.StockDetailTo;
import com.atguigu.common.to.mq.StockLockedTo;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.ware.dao.WareSkuDao;
import com.atguigu.gulimall.ware.entity.WareOrderTaskDetailEntity;
import com.atguigu.gulimall.ware.entity.WareOrderTaskEntity;
import com.atguigu.gulimall.ware.entity.WareSkuEntity;
import com.atguigu.gulimall.ware.feign.OrderFeignService;
import com.atguigu.gulimall.ware.feign.ProductFeignService;
import com.atguigu.gulimall.ware.service.WareOrderTaskDetailService;
import com.atguigu.gulimall.ware.service.WareOrderTaskService;
import com.atguigu.gulimall.ware.service.WareSkuService;
import com.atguigu.gulimall.ware.vo.OrderItemVo;
import com.atguigu.gulimall.ware.vo.OrderVo;
import com.atguigu.gulimall.ware.vo.SkuHasStockVo;
import com.atguigu.gulimall.ware.vo.WareSkuLockVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.Data;
import org.apache.commons.lang3.StringUtils;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Autowired
    WareSkuDao wareSkuDao;

    @Autowired
    WareOrderTaskService orderTaskService;

    @Autowired
    WareOrderTaskDetailService orderTaskDetailService;

    @Autowired
    RabbitTemplate rabbitTemplate;

    @Autowired
    ProductFeignService productFeignService;

    @Autowired
    OrderFeignService orderFeignService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        QueryWrapper<WareSkuEntity> wrapper=new QueryWrapper<>();
        String skuId=(String)params.get("skuId");
        if (!StringUtils.isEmpty(skuId)){
            wrapper.eq("sku_id",skuId);
        }
        String wareId=(String)params.get("wareId");
        if (!StringUtils.isEmpty(wareId)){
            wrapper.eq("ware_id",wareId);
        }
        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                wrapper
        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        List<WareSkuEntity> wareSkuEntities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if (wareSkuEntities==null||wareSkuEntities.size()==0){
            WareSkuEntity ware=new WareSkuEntity();
            ware.setSkuId(skuId);
            ware.setWareId(wareId);
            ware.setStock(skuNum);
            ware.setStock(0);
            //todo远程查询sku名字
            try {
                R info = productFeignService.info(skuId);
                Map<String,Object> map=(Map<String,Object>)info.get("skuInfo");
                if (info.getCode()==0){
                    ware.setSkuName((String)map.get("skuName"));
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            wareSkuDao.insert(ware);
        }else {
            wareSkuDao.addStock(skuId,wareId,skuNum);
        }

    }

    @Override
    public List<SkuHasStockVo> getSkusHasStock(List<Long> skuIds) {
        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {
            SkuHasStockVo vo = new SkuHasStockVo();
            //查询当前sku的库存
            Long count=baseMapper.getSkuStock(skuId);
            vo.setSkuId(skuId);
            vo.setHasStock(count==null?false:count>0);
            return vo;
        }).collect(Collectors.toList());
        return collect;
    }

    @Transactional(rollbackFor = NoStockException.class)
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {
        /**
         * 保存库存工作单的详情
         * 追溯
         */
        WareOrderTaskEntity taskEntity = new WareOrderTaskEntity();
        taskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(taskEntity);
        //1 按照下单的收获地址，找到一个就近仓库，锁定库存

        //找到每个商品在哪个仓库都有库存
        List<OrderItemVo> locks = vo.getLocks();

        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            Long skuId = item.getSkuId();
            stock.setSkuId(skuId);
            stock.setNum(item.getCount());
            //查询商品库存
            List<Long> wareIds=wareSkuDao.listWareIdHasSkuStock(skuId);
            stock.setWareId(wareIds);
            return stock;
        }).collect(Collectors.toList());
        Boolean allLock=true;
        //2. 锁定库存
        for (SkuWareHasStock hasStock : collect) {
            Boolean skuStocked=false;
            Long skuId = hasStock.getSkuId();
            List<Long> wareIds = hasStock.getWareId();
            if (wareIds==null||wareIds.size()==0) {
                throw new NoStockException(skuId);
            }

            for (Long wareId : wareIds) {
                //成功 1  失败 0
                Long count=wareSkuDao.lockSkuStock(skuId,wareId,hasStock.getNum());
                if (count==1) {
                    //成功
                    skuStocked=true;
                    //todo 告诉mq库存锁定成功
                    WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity(null,skuId,null,hasStock.getNum(),taskEntity.getId(),wareId,1);
                    orderTaskDetailService.save(entity);
                    //rabbitTemplate
                    StockLockedTo lockedTo = new StockLockedTo();
                    lockedTo.setId(taskEntity.getId());
                    StockDetailTo detail = new StockDetailTo();
                    BeanUtils.copyProperties(entity,detail);
                    //只发id不行，防止回滚后找不到数据
                    lockedTo.setDetail(detail);
                    rabbitTemplate.convertAndSend("stock-event-exchange","stock.locked",lockedTo);
                    break;
                }else{
                    //失败，重试下一个仓库
                }
            }

            if (skuStocked==false){
                //当前商品所有仓库都没锁住
                throw new NoStockException(skuId);
            }


        }

        //3 到这里全部都是锁定成功的

        return true;
    }

    @Override
    public void unLockStock(StockLockedTo to) {

            System.out.println("解锁库存消息");
//        Long id = to.getId();
            StockDetailTo detail = to.getDetail();
            Long detailId = detail.getId();
            //解锁
            //查询数据库该订单锁库存信息
            //有 证明库存锁定成功了
            //解锁情况
            //  1. 没有这个订单，必须解锁
            //  2. 有这个订单，不是解锁库存
            //订单状态 已取消 解锁库存
            //         没取消 不解锁
            //没有 库存锁定失败 库存回滚 无需解锁

            WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
            if (byId!=null) {
                //解锁
                Long id = to.getId();
                WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
                String orderSn = taskEntity.getOrderSn();//根据订单状态
                R r = orderFeignService.getOrderStatus(orderSn);
                if (r.getCode()==0) {
                    //订单数据返回成功
                    OrderVo data = (OrderVo) r.getData(new TypeReference<OrderVo>(){});

                    if (data==null||data.getStatus()==4){
                        //订单不存在
                        //订单已取消 解锁
                        if (byId.getLockStatus()==1) {
                            unLockStock(detail.getSkuId(),detail.getWareId(),detail.getSkuNum(),detailId);
                        }
//                        channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
                    }
                }else {
                    //消息拒绝重新放入队列，让别人继续消费解锁
//                    channel.basicReject(message.getMessageProperties().getDeliveryTag(),true);
                    throw new RuntimeException("远程服务失败");
                }
            }else{
                //无需解锁
//                channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
            }
    }

    /**
     * 防止订单服务卡顿，导致订单状态信息一致改不了，库存消息优先到期。查询订单状态为新建，就不解锁，什么都不做就走了
     * 导致卡顿的订单永远不能解锁库存
     * @param orderTo
     */
    @Transactional
    @Override
    public void unLockStock(OrderTo orderTo) {
        String orderSn = orderTo.getOrderSn();
        //查询最新库存解锁状态
//        R r = orderFeignService.getOrderStatus(orderSn);
        WareOrderTaskEntity task=orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
        //按照工作单，找到未解锁库存，解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>()
                .eq("task_id", id)
                .eq("lock_status", 1));
        //解锁  Long skuId,Long wareId,Integer num,Long taskDetailId
        for (WareOrderTaskDetailEntity entity : entities) {
            unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
        }



    }

    private void unLockStock(Long skuId,Long wareId,Integer num,Long taskDetailId){
        //库存解锁
        wareSkuDao.unLockStock(skuId,wareId,num);
        //更新库存工作单的状态
        WareOrderTaskDetailEntity entity = new WareOrderTaskDetailEntity();
        entity.setId(taskDetailId);
        entity.setLockStatus(2);
        orderTaskDetailService.updateById(entity);
    }

    @Data
    class SkuWareHasStock{

        private Long skuId;

        private List<Long> wareId;

        private Integer num;

    }


}
